Step 3.7 Flash is StepFun's latest high-efficiency multimodal Mixture-of-Experts model. It pairs a 196B-parameter language backbone with a vision encoder for native image and video understanding, activating roughly 11B parameters...
Model details →StepFun: Step 3.7 Flash vs Anthropic: Claude Opus Latest
StepFun: Step 3.7 Flash wins on 2 of 6 axes — pricing and capability skew in its favour for most workloads.
This model always redirects to the latest model in the Claude Opus family.
Model details →Side-by-side comparison
| Capability | StepFun: Step 3.7 Flash | Anthropic: Claude Opus Latest | Winner |
|---|---|---|---|
| Context window Maximum number of input tokens the model can attend to in a single request. | 262K | 1M | 🏆 Anthropic: Claude Opus Latest |
| Input price (per 1M) Cost per million input tokens billed by the provider. | $0.20 | $5.00 | 🏆 StepFun: Step 3.7 Flash |
| Output price (per 1M) Cost per million output tokens billed by the provider. | $1.15 | $25.00 | 🏆 StepFun: Step 3.7 Flash |
| Tool / function calling First-class support for emitting structured tool calls. | Yes | Yes | Tie |
| Vision input Accepts image inputs alongside text. | Yes | Yes | Tie |
| Reasoning mode Internal chain-of-thought / extended-thinking support. | Yes | Yes | Tie |
Frequently asked questions
Is StepFun: Step 3.7 Flash better than Anthropic: Claude Opus Latest?
StepFun: Step 3.7 Flash wins on 2 of 6 axes — pricing and capability skew in its favour for most workloads.
What's the price difference between StepFun: Step 3.7 Flash and Anthropic: Claude Opus Latest?
Input: $0.20 vs $5.00 per 1M tokens. Output: $1.15 vs $25.00 per 1M tokens.
What context windows do StepFun: Step 3.7 Flash and Anthropic: Claude Opus Latest support?
StepFun: Step 3.7 Flash supports up to 262K tokens. Anthropic: Claude Opus Latest supports up to 1M tokens.
Do both StepFun: Step 3.7 Flash and Anthropic: Claude Opus Latest support tool calling?
StepFun: Step 3.7 Flash: yes. Anthropic: Claude Opus Latest: yes.
Compare StepFun: Step 3.7 Flash with other models
vs Anthropic Claude Haiku Latestvs Anthropic Claude Sonnet Latestvs Anthropic: Claude Fable Latestvs Anthropic: Claude Opus Latest